There has a board Devkit7000 baesd on Samsung S5pv210 processor from Embest. After I press the S4 switch the screen brightens and the slowly dims.
I also tried the SD card boot creating a bootable SDcard.
But I can only receive a “OK” in the hyper terminal.

What's this problem?

 

I tested with TF card boot on a good board and Faulty board. Attaching the screen shots of the Com port debug info.



1)Faulty board without SD card and the settings to boot from SD card

SD Init Error
_


2)Faulty Board with SD card inserted

OK_


3)Good Board Without SD card inserted and settings for SD card boot

OK
SD Init Error

what is wrong with it?